feat(oft-solana): create update metadata script

[nazreen]

Testing

LAYERZERO_EXAMPLES_REPOSITORY_REF=#nazreen/oft-solana/update-metadata LZ_ENABLE_SOLANA_OFT_EXAMPLE=1 npx create-lz-oapp@latest

Follow the usual steps until the create step.
After OFT has been created, you can proceed with below.

You can create your own metadata.json with contents like below:

{
    "name": "Kaos Fried Chicken",
    "symbol": "KFC",
    "description": "One Chicken, Billions of Stomachs",
    "image": "https://nandos.com.my/wp-content/uploads/2023/04/logo.png"
}

or the one I've already uploaded: https://ipfs.io/ipfs/bafkreidhlizbsd5djgulf36gjmv26cwu46tfmvoz3z5erlhvsirfqayxxy

To test the new command:

npx hardhat lz:oft:solana:update-metadata --eid <EID> --mint <MINT> --uri https://ipfs.io/ipfs/<CID>